Definition of Texture
Texture describes the tactile quality of a form. Accurate rendering of an object's texture is the key to very realistic (particularly 'photo-realistic') drawing.
The textures of some objects can be particularly challenging due to movement (water), fine detail (skin surface and hair, grass, leaves) or their ethereal quality (cloud, glass).
The texture in a drawing is also a product of the support, such as paper or canvas. Some papers, particularly those for pastel and watercolor, have a textured surface due to the fibres or the mold used to make the paper. Different mediums will show up the inherent texture in the paper.

Types of Texture
Texture are "surface" designs which support the illusion of real substances or present invented composites. There are 2 types of texture. ACTUAL texturesrefers to surface illusions of wood, water, glass, clouds, fabrics, metal, etc.
orks of art, has a texture or surface. Texture can be rough, bumpy, slick, scratchy, smooth, silky, soft, prickly, the list is endless. They are two basic types of texture, tactile textures: is real and can be felt by touch and visual texture, is seen by the eye. All tactile textures provides visual textures as well, on the other hand visual textures can be real or illusory .

How can texture influence the characteristics of a space?
It can influence on the distance, length, width. Can make appear that a space is smaller or bigger depending on the texture of it, it changes the measures of the space.